... 8, ``Celestial Mechanics'', 2002 Symplectic integrators for studying the long­term evolution of high­eccentricity orbits V. V. Emel'yanenko South Ural University, Chelyabinsk, Russia Discoveries of many new objects moving on high­eccentricity orbits in the Solar system and beyond have highlighted the importance of modeling the long­ term evolution of such orbits. ... Astron. ... Preto M., Tremaine S. A class of symplectic integrators with adaptive timestep for separable Hamiltonian systems. ...

Next: Reduction Strategies Up: Image Data Concepts Previous: Image Coordinate Systems . ... The task parameter, region , which gives the region-of-interest consists of a combination of subcommands. ... Subsequent image coordinates are relative to the reference pixel, as defined by the header of the map of interest. ... Subsequent image coordinates are given in arcseconds, and are relative to the reference pixel of the map of interest. kms . ...

Allows you to specify the magnitude, proper motion, etc. of the object. ... Mag : magnitude of object. ... Obs Date : date of observation; used for correcting proper motion and radial velocity. ... PM RA/Long : proper motion in RA or Longitude, in arcsec/century. ... Warning: like all option panels, this one must be visible for its settings to have any effect. ... Defaults: restores this panel to its default values (the same values that will be used if you slew with this panel closed). ...

... Up: Description of program searchdup Previous: Program use . Input records are ordered per date of observation, and the list of known (observed) sources is cleared. Each record is compared in position to all the known sources. If the sky distance is less or equal to the specified one, the record is added to the list of observations for that source. If no known sources are within the specified radius, a new source is created, with the coordinates of the observation record. ...

Astronomy Discussion Forums . Forums: . Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Discussion Forums . ... Depends . Forum List | ... Post Message | ... Posted by Rick Crockett on April 3, 2004 23:11:37 UTC . ... Correctamundo - rickcrockett - April 5, 2004 - 16:42 UTC . ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Consequently, it is inappropriate to expand and in ordinary spherical harmonics. The proper expansion expresses both and simultaneously in terms of a particular order of generalized spherical harmonics. ... Generalized spherical harmonics start at , and for each , . ... Generalized spherical harmonics obey a sum rule analogous to a familiar one for ordinary spherical harmonics, but it includes an explicit phase factor which depends on the orientation of the two lines of sight. ...

... In the above example, the second region uses the global coordinate system (PHYSICAL by default). ... Supported systems include: name description ---- ----------- PHYSICAL pixel coords of original file using LTM/LTV IMAGE pixel coords of current file FK4, B1950 sky coordinate systems FK5, J2000 sky coordinate systems GALACTIC sky coordinate systems ECLIPTIC sky coordinate systems ICRS currently same as J2000 LINEAR linear wcs as defined in file In addition, two mosaic coordinate ...

... Step 1: The magnetic field line tracing from the satellite position up to magnetic equatorial plane using IGRF magnetic field model. Step 2: Tracing back from the point (produced on the Step 1) to the Ionosphere (by using only dipole magnetic field) . ... The magnetic field line tracing from the satellite position up to the Ionosphere (the stop trace altitude 110 km) using Main (dipole) + Extraterrestrial magnetic field model (for example, Tsyganenko [1987], or [1989], or [1990] ) . ...

... Step 1: The Footprint position calculation by the magnetic field line tracing from the satellite position up to the Ionosphere by using IGRF + Tsyganenko [1987] magnetic field model (the stop trace altitude 110 km). Step 2: Tracing back from the Footprint (produced on the Step 1) to the dipole equatorial plane (by using only IGRF magnetic field model up to the geocentric distance 8 RE and dipole field model after this distance). ... Back to the description . ...

Trail encounter . ... Expected meteor rates . ... The Leonids are the debris of Comet 55P/Tempel-Tuttle. ... The Earth's passage right through the centre of trails is associated with the most spectacular meteor displays (studies show that, as well as how close to the centre of the trail you are, the strength of the display also depends on how far along a trail's length you are). ... The encounter with the 1932 trail will lead to enhanced meteor activity: a nice outburst, but below storm level. ...

ESO Phase 3 Data Release Description Please start from this template when preparing the documentation for your ESO Phase 3 data release. ... Finally, the release description will be published as submitted - without further editing by ESO - to support the user community in utilizing the data. ... Please indicate if this is a catalogue data release. ... Data Reduction and Calibration Please address the following questions for scientific catalogue data, particularly in case of source catalogues: . ...

... Impact on source motion in Galactic coordinate system is given by Kovalevsky (2003), Malkin (2011) l cos b = -A sin l, b = -A cos l sin b, where A = R0 02 /c is the galactocentric acceleration called hereafter the GA constant. ... We just have to return to the traditional many-centuries-old astrometric practice of modelling the position of a celestial object as a linear trend with two parameters: the position at the initial (conventional) epoch and the apparent (proper) motion. ... 2011). ...

Apparent Encounters of the Outermost Satellites of Jupiter c 2004 Ц. M. I. Varfolomeev, N. V. Emelyanov Sternberg Astronomical Institute, 13 Universitetskij prospect, 119992 Moscow, Russia e-mail: maximus@sai.msu.ru Abstract. Orbital parameters of any two planetary satellites may be refined from ground-based observations on the basis of differences in their astrometric coordinates. ... For these intervals we calculated apparent angular distances between satellites for the beginning of each day. ...

... The procedure of radiometer signal integration can be considered as a sort of reducing dimension of the initial sampling space, where the samples are the result of analog-to-digital conversion. ... The probability distribution of the signal and spikes is completely known. ... The quality of the considered algorithm could be also illustrated by Figure 2 . ... One could see the considered adaptive algorithm is preferable even by low degree of compression, because all spikes have been depressed. ...

... AstroCC is a coordinate conversion utility for astronomy. It accepts an object designation or the coordinates of an object and calculates coordinates in alternative systems, and at different dates, times, and locations. It also provides lunar and bright planet coordinates to aid in planning observations. ... BJD values may also be retrieved from http://astroutils.astronomy.ohio-state.edu/time/utc2bjd.html which is based on Eastman et al. ... Coordinate data are obtained from SIMBAD. ...

As usual: it depends! It depends on the operating system of your laptop! And then: I don't know and it's not my task to know, so please don't ask me. ... In the menu "Start" -> "(all) Programs" -> "Accessories" -> "System Tools" -> "System Information" . click on "Components" -> "Network" -> "Adapters" . ... Open a DOS-window by clicking on "Start" -> "Programs" -> "Command Prompt" and enter the command "ipconfig /ALL" . ... Here you can find a more detailed description. ...

The T-matrix or transition matrix is well known in the quantum theory of scattering [ 56 ] where one also uses the Heisenberg S-matrix connected with the T-matrix by the relation . In contrast to the coordinate representation in the integral equation method, where the scattered and incident fields are connected by the Green function, the T-matrix connects the coefficients of the expansions of the scattered and incident fields in terms of a complete system of the vector basis functions. ...

... Field size . Object name . ... Map size . ... Field size: the approximate size of the map in the Y direction. ... Galaxies: . ... Galaxies, which size exceeds some value depending on the field and map sizes, are displayed with their real positional angles and sizes by 25m isophote. ... In the "tools" fields there are links to the several famous AVO (Astrophysical Virtual Observatory) resources: NED and Simbad databases and DSS2 (Palomar Digitized Sky Survey) images of the corresponding sky area. ...

... DIAGNOSTICS OF IONOSPHERIC IRREGULARITY SPECTRUM USING MEASUREMENTS OF RADIO WAVE ANOMALOUS ATTENUATION UNDER VERTICAL SOUNDING . ... The selected experimental data are characterized by a high average level of attenuation of a signal of vertical sounding (10 dB and above), which cannot be caused by collisional absorption of radio waves (practically absent in a dark time of day) and, hence, being a consequence of scattering on random irregularities. ... ATTENUATION OF A VERTICAL SOUNDING SIGNAL . ...

James @album: Seven @song: Heavens ------------------------------------------------------ I've been sittin' on top of these rocks Watchin' the waters rise Everyone that I have loved has gone floating by I've been praying for the king of the world To come and rescue me from a clan that's lost in dream From a clan that's lost in dream Are you waiting for the heavens ( Heavens ) Are you waiting for the ...